conda

---

an open source package management system and environment management system

---

faqs

• find the latest available version of python
  
• update python version for the current environment

---

links

• conda docs
  
• conda cheatsheet

datacamp:

• installing-anaconda-mac-os-x

---

setup

install

# installs to ~/usr/local/anaconda3/ by default
brew cask install anaconda

configure

add the following to your .zshrc / .bash_profile

export PATH=/usr/local/anaconda3/bin:"$PATH"

initialize your .zshrc / .bash_profile

conda init zsh
conda init bash

info

conda --version
which conda # doesn't work...
conda info

# get help
conda --help
conda install --help

upgrade

warning: this will delete all your conda environments!

brew cask upgrade anaconda

uninstall

# remove the configs
conda install anaconda-clean
anaconda-clean --yes 

# creates a backup folder which you can also remove if you want to
rm -rf ~/.anaconda_backup

# uninstall anaconda
brew cask uninstall anaconda

If you installed via a method other than brew cask you may need to manually remove the anaconda install folder and

rm -rf ~/anaconda3

You will also need to remove the >>> conda init >>> section in ~/.bash_profile and ~/.zshrc.

---

environments

# main directory for current env
echo $CONDA_PREFIX

# list all environments
conda env list
conda info --envs

# create new environments (see also note below)
conda create -y --name py2 python=2.7.12 
conda create -y --name py3 python=3.7.4

# clone an existing environment
conda create -y --clone py35 --name py35v2

# activate an environment
conda activate py3

# update python version for the current environment
conda update python

# deactivate an environment
conda deactivate

# delete an environment
conda env remove --name py2

If you want to use a specific environment by default you can add something like this to your .zshrc/.bash_profile

echo 'conda activate py3' >> ~/.zshrc
echo 'conda activate py3' >> ~/.bash_profile

---

packages

# list all package versions installed in active environment
conda list

# install a package or packages to the active environment
conda install numpy

# install a package version to the active environment
conda install numpy==1.11 

# update a package in the active environment
conda update numpy

# update all packages in the active environment
conda update --all

# install a package or packages to a named environment
conda install --name py3 \
#airflow \
#binarytree \
#boto3 \
#graphviz \
#ipykernel \
keras \
matplotlib \
numpy \
pandas \
#parquet-cpp \
#pyarrow \
pyhocon \
pymysql \
#python-graphviz \
seaborn \
#selenium \
scikit-learn \
scipy \
#snowflake-connector-python \
statsmodels \
xmltodict

# update all packages in a named environment
conda update --all --name py3

channels

# allow installation of conda-forge packages
conda config --add channels conda-forge

examples

conda install --name py3 -c conda-forge airflow
conda install --name py3 -c conda-forge binarytree
conda install --name py3 -c conda-forge jira
conda install --name py3 -c conda-forge pyspark
#conda install --name py3 -c conda-forge snowflake-connector-python
conda install --name py3 -c conda-forge xgboost

requirements

conda install --name py3 -c conda-forge --file requirements.txt

---

misc

search

# latest available python version
conda search python
conda search python | grep 'pkgs/main' | tail -1
conda search python | grep 'pkgs/main' | tail -1 | grep -Eo '(\d+\.\d+\.\d+){1}'

# latest available python package versions
conda search pandas | grep 'pkgs/main' | tail -1 | grep -Eo '(\d+\.\d+\.\d+){1}'
conda search scikit-learn | grep 'pkgs/main' | tail -1 | grep -Eo '(\d+\.\d+\.\d+){1}'

CondaHTTPError

Note: if you get a CondaHTTPError: HTTP 000 CONNECTION FAILED error, try running this:

conda config --set ssl_verify no